include/sound/hdaudio.h

   1 /*
   2  * HD-audio core stuff
   3  */
   4
   5 #ifndef __SOUND_HDAUDIO_H
   6 #define __SOUND_HDAUDIO_H
   7
   8 #include <linux/device.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/timecounter.h>
  11 #include <sound/core.h>
  12 #include <sound/memalloc.h>
  13 #include <sound/hda_verbs.h>
  14 #include <drm/i915_component.h>
  15
  16 /* codec node id */
  17 typedef u16 hda_nid_t;
  18
  19 struct hdac_bus;
  20 struct hdac_stream;
  21 struct hdac_device;
  22 struct hdac_driver;
  23 struct hdac_widget_tree;
  24 struct hda_device_id;
  25
  26 /*
  27  * exported bus type
  28  */
  29 extern struct bus_type snd_hda_bus_type;
  30
  31 /*
  32  * generic arrays
  33  */
  34 struct snd_array {
  35         unsigned int used;
  36         unsigned int alloced;
  37         unsigned int elem_size;
  38         unsigned int alloc_align;
  39         void *list;
  40 };
  41
  42 /*
  43  * HD-audio codec base device
  44  */
  45 struct hdac_device {
  46         struct device dev;
  47         int type;
  48         struct hdac_bus *bus;
  49         unsigned int addr;              /* codec address */
  50         struct list_head list;          /* list point for bus codec_list */
  51
  52         hda_nid_t afg;                  /* AFG node id */
  53         hda_nid_t mfg;                  /* MFG node id */
  54
  55         /* ids */
  56         unsigned int vendor_id;
  57         unsigned int subsystem_id;
  58         unsigned int revision_id;
  59         unsigned int afg_function_id;
  60         unsigned int mfg_function_id;
  61         unsigned int afg_unsol:1;
  62         unsigned int mfg_unsol:1;
  63
  64         unsigned int power_caps;        /* FG power caps */
  65
  66         const char *vendor_name;        /* codec vendor name */
  67         const char *chip_name;          /* codec chip name */
  68
  69         /* verb exec op override */
  70         int (*exec_verb)(struct hdac_device *dev, unsigned int cmd,
  71                          unsigned int flags, unsigned int *res);
  72
  73         /* widgets */
  74         unsigned int num_nodes;
  75         hda_nid_t start_nid, end_nid;
  76
  77         /* misc flags */
  78         atomic_t in_pm;         /* suspend/resume being performed */
  79         bool  link_power_control:1;
  80
  81         /* sysfs */
  82         struct hdac_widget_tree *widgets;
  83
  84         /* regmap */
  85         struct regmap *regmap;
  86         struct snd_array vendor_verbs;
  87         bool lazy_cache:1;      /* don't wake up for writes */
  88         bool caps_overwriting:1; /* caps overwrite being in process */
  89         bool cache_coef:1;      /* cache COEF read/write too */
  90 };
  91
  92 /* device/driver type used for matching */
  93 enum {
  94         HDA_DEV_CORE,
  95         HDA_DEV_LEGACY,
  96         HDA_DEV_ASOC,
  97 };
  98
  99 /* direction */
 100 enum {
 101         HDA_INPUT, HDA_OUTPUT
 102 };
 103
 104 #define dev_to_hdac_dev(_dev)   container_of(_dev, struct hdac_device, dev)
 105
 106 int snd_hdac_device_init(struct hdac_device *dev, struct hdac_bus *bus,
 107                          const char *name, unsigned int addr);
 108 void snd_hdac_device_exit(struct hdac_device *dev);
 109 int snd_hdac_device_register(struct hdac_device *codec);
 110 void snd_hdac_device_unregister(struct hdac_device *codec);
 111 int snd_hdac_device_set_chip_name(struct hdac_device *codec, const char *name);
 112 int snd_hdac_codec_modalias(struct hdac_device *hdac, char *buf, size_t size);
 113
 114 int snd_hdac_refresh_widgets(struct hdac_device *codec);
 115 int snd_hdac_refresh_widget_sysfs(struct hdac_device *codec);
 116
 117 unsigned int snd_hdac_make_cmd(struct hdac_device *codec, hda_nid_t nid,
 118                                unsigned int verb, unsigned int parm);
 119 int snd_hdac_exec_verb(struct hdac_device *codec, unsigned int cmd,
 120                        unsigned int flags, unsigned int *res);
 121 int snd_hdac_read(struct hdac_device *codec, hda_nid_t nid,
 122                   unsigned int verb, unsigned int parm, unsigned int *res);
 123 int _snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid, int parm,
 124                         unsigned int *res);
 125 int snd_hdac_read_parm_uncached(struct hdac_device *codec, hda_nid_t nid,
 126                                 int parm);
 127 int snd_hdac_override_parm(struct hdac_device *codec, hda_nid_t nid,
 128                            unsigned int parm, unsigned int val);
 129 int snd_hdac_get_connections(struct hdac_device *codec, hda_nid_t nid,
 130                              hda_nid_t *conn_list, int max_conns);
 131 int snd_hdac_get_sub_nodes(struct hdac_device *codec, hda_nid_t nid,
 132                            hda_nid_t *start_id);
 133 unsigned int snd_hdac_calc_stream_format(unsigned int rate,
 134                                          unsigned int channels,
 135                                          unsigned int format,
 136                                          unsigned int maxbps,
 137                                          unsigned short spdif_ctls);
 138 int snd_hdac_query_supported_pcm(struct hdac_device *codec, hda_nid_t nid,
 139                                 u32 *ratesp, u64 *formatsp, unsigned int *bpsp);
 140 bool snd_hdac_is_supported_format(struct hdac_device *codec, hda_nid_t nid,
 141                                   unsigned int format);
 142
 143 int snd_hdac_codec_read(struct hdac_device *hdac, hda_nid_t nid,
 144                         int flags, unsigned int verb, unsigned int parm);
 145 int snd_hdac_codec_write(struct hdac_device *hdac, hda_nid_t nid,
 146                         int flags, unsigned int verb, unsigned int parm);
 147 bool snd_hdac_check_power_state(struct hdac_device *hdac,
 148                 hda_nid_t nid, unsigned int target_state);
 149 /**
 150  * snd_hdac_read_parm - read a codec parameter
 151  * @codec: the codec object
 152  * @nid: NID to read a parameter
 153  * @parm: parameter to read
 154  *
 155  * Returns -1 for error.  If you need to distinguish the error more
 156  * strictly, use _snd_hdac_read_parm() directly.
 157  */
 158 static inline int snd_hdac_read_parm(struct hdac_device *codec, hda_nid_t nid,
 159                                      int parm)
 160 {
 161         unsigned int val;
 162
 163         return _snd_hdac_read_parm(codec, nid, parm, &val) < 0 ? -1 : val;
 164 }
 165
 166 #ifdef CONFIG_PM
 167 int snd_hdac_power_up(struct hdac_device *codec);
 168 int snd_hdac_power_down(struct hdac_device *codec);
 169 int snd_hdac_power_up_pm(struct hdac_device *codec);
 170 int snd_hdac_power_down_pm(struct hdac_device *codec);
 171 int snd_hdac_keep_power_up(struct hdac_device *codec);
 172 #else
 173 static inline int snd_hdac_power_up(struct hdac_device *codec) { return 0; }
 174 static inline int snd_hdac_power_down(struct hdac_device *codec) { return 0; }
 175 static inline int snd_hdac_power_up_pm(struct hdac_device *codec) { return 0; }
 176 static inline int snd_hdac_power_down_pm(struct hdac_device *codec) { return 0; }
 177 static inline int snd_hdac_keep_power_up(struct hdac_device *codec) { return 0; }
 178 #endif
 179
 180 /*
 181  * HD-audio codec base driver
 182  */
 183 struct hdac_driver {
 184         struct device_driver driver;
 185         int type;
 186         const struct hda_device_id *id_table;
 187         int (*match)(struct hdac_device *dev, struct hdac_driver *drv);
 188         void (*unsol_event)(struct hdac_device *dev, unsigned int event);
 189 };
 190
 191 #define drv_to_hdac_driver(_drv) container_of(_drv, struct hdac_driver, driver)
 192
 193 const struct hda_device_id *
 194 hdac_get_device_id(struct hdac_device *hdev, struct hdac_driver *drv);
 195
 196 /*
 197  * Bus verb operators
 198  */
 199 struct hdac_bus_ops {
 200         /* send a single command */
 201         int (*command)(struct hdac_bus *bus, unsigned int cmd);
 202         /* get a response from the last command */
 203         int (*get_response)(struct hdac_bus *bus, unsigned int addr,
 204                             unsigned int *res);
 205         /* control the link power  */
 206         int (*link_power)(struct hdac_bus *bus, bool enable);
 207 };
 208
 209 /*
 210  * Lowlevel I/O operators
 211  */
 212 struct hdac_io_ops {
 213         /* mapped register accesses */
 214         void (*reg_writel)(u32 value, u32 __iomem *addr);
 215         u32 (*reg_readl)(u32 __iomem *addr);
 216         void (*reg_writew)(u16 value, u16 __iomem *addr);
 217         u16 (*reg_readw)(u16 __iomem *addr);
 218         void (*reg_writeb)(u8 value, u8 __iomem *addr);
 219         u8 (*reg_readb)(u8 __iomem *addr);
 220         /* Allocation ops */
 221         int (*dma_alloc_pages)(struct hdac_bus *bus, int type, size_t size,
 222                                struct snd_dma_buffer *buf);
 223         void (*dma_free_pages)(struct hdac_bus *bus,
 224                                struct snd_dma_buffer *buf);
 225 };
 226
 227 #define HDA_UNSOL_QUEUE_SIZE    64
 228 #define HDA_MAX_CODECS          8       /* limit by controller side */
 229
 230 /* HD Audio class code */
 231 #define PCI_CLASS_MULTIMEDIA_HD_AUDIO   0x0403
 232
 233 /*
 234  * CORB/RIRB
 235  *
 236  * Each CORB entry is 4byte, RIRB is 8byte
 237  */
 238 struct hdac_rb {
 239         __le32 *buf;            /* virtual address of CORB/RIRB buffer */
 240         dma_addr_t addr;        /* physical address of CORB/RIRB buffer */
 241         unsigned short rp, wp;  /* RIRB read/write pointers */
 242         int cmds[HDA_MAX_CODECS];       /* number of pending requests */
 243         u32 res[HDA_MAX_CODECS];        /* last read value */
 244 };
 245
 246 /*
 247  * HD-audio bus base driver
 248  */
 249 struct hdac_bus {
 250         struct device *dev;
 251         const struct hdac_bus_ops *ops;
 252         const struct hdac_io_ops *io_ops;
 253
 254         /* h/w resources */
 255         unsigned long addr;
 256         void __iomem *remap_addr;
 257         int irq;
 258
 259         /* codec linked list */
 260         struct list_head codec_list;
 261         unsigned int num_codecs;
 262
 263         /* link caddr -> codec */
 264         struct hdac_device *caddr_tbl[HDA_MAX_CODEC_ADDRESS + 1];
 265
 266         /* unsolicited event queue */
 267         u32 unsol_queue[HDA_UNSOL_QUEUE_SIZE * 2]; /* ring buffer */
 268         unsigned int unsol_rp, unsol_wp;
 269         struct work_struct unsol_work;
 270
 271         /* bit flags of detected codecs */
 272         unsigned long codec_mask;
 273
 274         /* bit flags of powered codecs */
 275         unsigned long codec_powered;
 276
 277         /* CORB/RIRB */
 278         struct hdac_rb corb;
 279         struct hdac_rb rirb;
 280         unsigned int last_cmd[HDA_MAX_CODECS];  /* last sent command */
 281
 282         /* CORB/RIRB and position buffers */
 283         struct snd_dma_buffer rb;
 284         struct snd_dma_buffer posbuf;
 285
 286         /* hdac_stream linked list */
 287         struct list_head stream_list;
 288
 289         /* operation state */
 290         bool chip_init:1;               /* h/w initialized */
 291
 292         /* behavior flags */
 293         bool sync_write:1;              /* sync after verb write */
 294         bool use_posbuf:1;              /* use position buffer */
 295         bool snoop:1;                   /* enable snooping */
 296         bool align_bdle_4k:1;           /* BDLE align 4K boundary */
 297         bool reverse_assign:1;          /* assign devices in reverse order */
 298         bool corbrp_self_clear:1;       /* CORBRP clears itself after reset */
 299
 300         int bdl_pos_adj;                /* BDL position adjustment */
 301
 302         /* locks */
 303         spinlock_t reg_lock;
 304         struct mutex cmd_mutex;
 305
 306         /* i915 component interface */
 307         struct i915_audio_component *audio_component;
 308         int i915_power_refcount;
 309 };
 310
 311 int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 312                       const struct hdac_bus_ops *ops,
 313                       const struct hdac_io_ops *io_ops);
 314 void snd_hdac_bus_exit(struct hdac_bus *bus);
 315 int snd_hdac_bus_exec_verb(struct hdac_bus *bus, unsigned int addr,
 316                            unsigned int cmd, unsigned int *res);
 317 int snd_hdac_bus_exec_verb_unlocked(struct hdac_bus *bus, unsigned int addr,
 318                                     unsigned int cmd, unsigned int *res);
 319 void snd_hdac_bus_queue_event(struct hdac_bus *bus, u32 res, u32 res_ex);
 320
 321 int snd_hdac_bus_add_device(struct hdac_bus *bus, struct hdac_device *codec);
 322 void snd_hdac_bus_remove_device(struct hdac_bus *bus,
 323                                 struct hdac_device *codec);
 324
 325 static inline void snd_hdac_codec_link_up(struct hdac_device *codec)
 326 {
 327         set_bit(codec->addr, &codec->bus->codec_powered);
 328 }
 329
 330 static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
 331 {
 332         clear_bit(codec->addr, &codec->bus->codec_powered);
 333 }
 334
 335 int snd_hdac_bus_send_cmd(struct hdac_bus *bus, unsigned int val);
 336 int snd_hdac_bus_get_response(struct hdac_bus *bus, unsigned int addr,
 337                               unsigned int *res);
 338 int snd_hdac_link_power(struct hdac_device *codec, bool enable);
 339
 340 bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset);
 341 void snd_hdac_bus_stop_chip(struct hdac_bus *bus);
 342 void snd_hdac_bus_init_cmd_io(struct hdac_bus *bus);
 343 void snd_hdac_bus_stop_cmd_io(struct hdac_bus *bus);
 344 void snd_hdac_bus_enter_link_reset(struct hdac_bus *bus);
 345 void snd_hdac_bus_exit_link_reset(struct hdac_bus *bus);
 346
 347 void snd_hdac_bus_update_rirb(struct hdac_bus *bus);
 348 int snd_hdac_bus_handle_stream_irq(struct hdac_bus *bus, unsigned int status,
 349                                     void (*ack)(struct hdac_bus *,
 350                                                 struct hdac_stream *));
 351
 352 int snd_hdac_bus_alloc_stream_pages(struct hdac_bus *bus);
 353 void snd_hdac_bus_free_stream_pages(struct hdac_bus *bus);
 354
 355 /*
 356  * macros for easy use
 357  */
 358 #define _snd_hdac_chip_write(type, chip, reg, value) \
 359         ((chip)->io_ops->reg_write ## type(value, (chip)->remap_addr + (reg)))
 360 #define _snd_hdac_chip_read(type, chip, reg) \
 361         ((chip)->io_ops->reg_read ## type((chip)->remap_addr + (reg)))
 362
 363 /* read/write a register, pass without AZX_REG_ prefix */
 364 #define snd_hdac_chip_writel(chip, reg, value) \
 365         _snd_hdac_chip_write(l, chip, AZX_REG_ ## reg, value)
 366 #define snd_hdac_chip_writew(chip, reg, value) \
 367         _snd_hdac_chip_write(w, chip, AZX_REG_ ## reg, value)
 368 #define snd_hdac_chip_writeb(chip, reg, value) \
 369         _snd_hdac_chip_write(b, chip, AZX_REG_ ## reg, value)
 370 #define snd_hdac_chip_readl(chip, reg) \
 371         _snd_hdac_chip_read(l, chip, AZX_REG_ ## reg)
 372 #define snd_hdac_chip_readw(chip, reg) \
 373         _snd_hdac_chip_read(w, chip, AZX_REG_ ## reg)
 374 #define snd_hdac_chip_readb(chip, reg) \
 375         _snd_hdac_chip_read(b, chip, AZX_REG_ ## reg)
 376
 377 /* update a register, pass without AZX_REG_ prefix */
 378 #define snd_hdac_chip_updatel(chip, reg, mask, val) \
 379         snd_hdac_chip_writel(chip, reg, \
 380                              (snd_hdac_chip_readl(chip, reg) & ~(mask)) | (val))
 381 #define snd_hdac_chip_updatew(chip, reg, mask, val) \
 382         snd_hdac_chip_writew(chip, reg, \
 383                              (snd_hdac_chip_readw(chip, reg) & ~(mask)) | (val))
 384 #define snd_hdac_chip_updateb(chip, reg, mask, val) \
 385         snd_hdac_chip_writeb(chip, reg, \
 386                              (snd_hdac_chip_readb(chip, reg) & ~(mask)) | (val))
 387
 388 /*
 389  * HD-audio stream
 390  */
 391 struct hdac_stream {
 392         struct hdac_bus *bus;
 393         struct snd_dma_buffer bdl; /* BDL buffer */
 394         __le32 *posbuf;         /* position buffer pointer */
 395         int direction;          /* playback / capture (SNDRV_PCM_STREAM_*) */
 396
 397         unsigned int bufsize;   /* size of the play buffer in bytes */
 398         unsigned int period_bytes; /* size of the period in bytes */
 399         unsigned int frags;     /* number for period in the play buffer */
 400         unsigned int fifo_size; /* FIFO size */
 401
 402         void __iomem *sd_addr;  /* stream descriptor pointer */
 403
 404         u32 sd_int_sta_mask;    /* stream int status mask */
 405
 406         /* pcm support */
 407         struct snd_pcm_substream *substream;    /* assigned substream,
 408                                                  * set in PCM open
 409                                                  */
 410         unsigned int format_val;        /* format value to be set in the
 411                                          * controller and the codec
 412                                          */
 413         unsigned char stream_tag;       /* assigned stream */
 414         unsigned char index;            /* stream index */
 415         int assigned_key;               /* last device# key assigned to */
 416
 417         bool opened:1;
 418         bool running:1;
 419         bool prepared:1;
 420         bool no_period_wakeup:1;
 421         bool locked:1;
 422
 423         /* timestamp */
 424         unsigned long start_wallclk;    /* start + minimum wallclk */
 425         unsigned long period_wallclk;   /* wallclk for period */
 426         struct timecounter  tc;
 427         struct cyclecounter cc;
 428         int delay_negative_threshold;
 429
 430         struct list_head list;
 431 #ifdef CONFIG_SND_HDA_DSP_LOADER
 432         /* DSP access mutex */
 433         struct mutex dsp_mutex;
 434 #endif
 435 };
 436
 437 void snd_hdac_stream_init(struct hdac_bus *bus, struct hdac_stream *azx_dev,
 438                           int idx, int direction, int tag);
 439 struct hdac_stream *snd_hdac_stream_assign(struct hdac_bus *bus,
 440                                            struct snd_pcm_substream *substream);
 441 void snd_hdac_stream_release(struct hdac_stream *azx_dev);
 442 struct hdac_stream *snd_hdac_get_stream(struct hdac_bus *bus,
 443                                         int dir, int stream_tag);
 444
 445 int snd_hdac_stream_setup(struct hdac_stream *azx_dev);
 446 void snd_hdac_stream_cleanup(struct hdac_stream *azx_dev);
 447 int snd_hdac_stream_setup_periods(struct hdac_stream *azx_dev);
 448 int snd_hdac_stream_set_params(struct hdac_stream *azx_dev,
 449                                 unsigned int format_val);
 450 void snd_hdac_stream_start(struct hdac_stream *azx_dev, bool fresh_start);
 451 void snd_hdac_stream_clear(struct hdac_stream *azx_dev);
 452 void snd_hdac_stream_stop(struct hdac_stream *azx_dev);
 453 void snd_hdac_stream_reset(struct hdac_stream *azx_dev);
 454 void snd_hdac_stream_sync_trigger(struct hdac_stream *azx_dev, bool set,
 455                                   unsigned int streams, unsigned int reg);
 456 void snd_hdac_stream_sync(struct hdac_stream *azx_dev, bool start,
 457                           unsigned int streams);
 458 void snd_hdac_stream_timecounter_init(struct hdac_stream *azx_dev,
 459                                       unsigned int streams);
 460 /*
 461  * macros for easy use
 462  */
 463 #define _snd_hdac_stream_write(type, dev, reg, value)                   \
 464         ((dev)->bus->io_ops->reg_write ## type(value, (dev)->sd_addr + (reg)))
 465 #define _snd_hdac_stream_read(type, dev, reg)                           \
 466         ((dev)->bus->io_ops->reg_read ## type((dev)->sd_addr + (reg)))
 467
 468 /* read/write a register, pass without AZX_REG_ prefix */
 469 #define snd_hdac_stream_writel(dev, reg, value) \
 470         _snd_hdac_stream_write(l, dev, AZX_REG_ ## reg, value)
 471 #define snd_hdac_stream_writew(dev, reg, value) \
 472         _snd_hdac_stream_write(w, dev, AZX_REG_ ## reg, value)
 473 #define snd_hdac_stream_writeb(dev, reg, value) \
 474         _snd_hdac_stream_write(b, dev, AZX_REG_ ## reg, value)
 475 #define snd_hdac_stream_readl(dev, reg) \
 476         _snd_hdac_stream_read(l, dev, AZX_REG_ ## reg)
 477 #define snd_hdac_stream_readw(dev, reg) \
 478         _snd_hdac_stream_read(w, dev, AZX_REG_ ## reg)
 479 #define snd_hdac_stream_readb(dev, reg) \
 480         _snd_hdac_stream_read(b, dev, AZX_REG_ ## reg)
 481
 482 /* update a register, pass without AZX_REG_ prefix */
 483 #define snd_hdac_stream_updatel(dev, reg, mask, val) \
 484         snd_hdac_stream_writel(dev, reg, \
 485                                (snd_hdac_stream_readl(dev, reg) & \
 486                                 ~(mask)) | (val))
 487 #define snd_hdac_stream_updatew(dev, reg, mask, val) \
 488         snd_hdac_stream_writew(dev, reg, \
 489                                (snd_hdac_stream_readw(dev, reg) & \
 490                                 ~(mask)) | (val))
 491 #define snd_hdac_stream_updateb(dev, reg, mask, val) \
 492         snd_hdac_stream_writeb(dev, reg, \
 493                                (snd_hdac_stream_readb(dev, reg) & \
 494                                 ~(mask)) | (val))
 495
 496 #ifdef CONFIG_SND_HDA_DSP_LOADER
 497 /* DSP lock helpers */
 498 #define snd_hdac_dsp_lock_init(dev)     mutex_init(&(dev)->dsp_mutex)
 499 #define snd_hdac_dsp_lock(dev)          mutex_lock(&(dev)->dsp_mutex)
 500 #define snd_hdac_dsp_unlock(dev)        mutex_unlock(&(dev)->dsp_mutex)
 501 #define snd_hdac_stream_is_locked(dev)  ((dev)->locked)
 502 /* DSP loader helpers */
 503 int snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 504                          unsigned int byte_size, struct snd_dma_buffer *bufp);
 505 void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start);
 506 void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 507                           struct snd_dma_buffer *dmab);
 508 #else /* CONFIG_SND_HDA_DSP_LOADER */
 509 #define snd_hdac_dsp_lock_init(dev)     do {} while (0)
 510 #define snd_hdac_dsp_lock(dev)          do {} while (0)
 511 #define snd_hdac_dsp_unlock(dev)        do {} while (0)
 512 #define snd_hdac_stream_is_locked(dev)  0
 513
 514 static inline int
 515 snd_hdac_dsp_prepare(struct hdac_stream *azx_dev, unsigned int format,
 516                      unsigned int byte_size, struct snd_dma_buffer *bufp)
 517 {
 518         return 0;
 519 }
 520
 521 static inline void snd_hdac_dsp_trigger(struct hdac_stream *azx_dev, bool start)
 522 {
 523 }
 524
 525 static inline void snd_hdac_dsp_cleanup(struct hdac_stream *azx_dev,
 526                                         struct snd_dma_buffer *dmab)
 527 {
 528 }
 529 #endif /* CONFIG_SND_HDA_DSP_LOADER */
 530
 531
 532 /*
 533  * generic array helpers
 534  */
 535 void *snd_array_new(struct snd_array *array);
 536 void snd_array_free(struct snd_array *array);
 537 static inline void snd_array_init(struct snd_array *array, unsigned int size,
 538                                   unsigned int align)
 539 {
 540         array->elem_size = size;
 541         array->alloc_align = align;
 542 }
 543
 544 static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
 545 {
 546         return array->list + idx * array->elem_size;
 547 }
 548
 549 static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
 550 {
 551         return (unsigned long)(ptr - array->list) / array->elem_size;
 552 }
 553
 554 #endif /* __SOUND_HDAUDIO_H */